Animal door



FIG. 1 is a top, front, right side perspective view of an animal door, showing my new design;

FIG. 2 is a bottom, rear, left side perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is an alternative perspective view of the opened animal door.

The broken lines shown in the drawings illustrate portions of the animal door that form no part of the claimed design. 

CLAIM The ornamental design for an animal door, as shown and described. 